Sewing-machine



(No Model.) 2 Sheets-$heet 1. G. F, WAGHTERSHAUSER. SEWING MACHINE. No. 431,238. Patented July 1,1890;

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(No Model.) 2 sheet -sheet 2.

G. F. WAOHTERSHAUSER. SEWING MACHINE.

No. 431,238. Patented July 1, 1890;

. zi BY ATTORNEY.

UNITED STATES PATENT OFFICE.

GEORGE FRIEDRICH VVAOHTERSHAUSER, OF WILKES-BARRE, PENN SYLVANIA.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Application filed September 27, 1889.

To all whom it may concern-.-

Be it known that I, GEORGE FRIEDRICH WAcHTERsHAUsER, a citizen of the United States, residing at VVilkes-Barr, in the county of Luzerne and State of Pennsylvania, have Patent No. 431,238, dated July 1, 1890.

Serial No. 325,800. (No model.)

joint of the head Q and bushing R, as most plainly shown in Fig. 1.

The operation is as follows: Power is communicated to the shaft B, whereby the eccentric D is rotated, and owing to the yoke E osinventcd a new and useful Improvement i11\eillating motions are imparted to the arm F,

Sewing-Machines,which improvement is fully set forth in'the following specification and accompanying drawings.

My invention relates to improvements in sewinganachines; and it consists in mechanism, substantially as described, secured to the driving-shaft and the needle-bar for vertically reciprocating the latter.

It further consists in the combination of parts herein set forth and claimed.

Figure 1 represents a side elevation, partly broken away, of a sewing-machine embodying my invention. Figs. 2 and 3 represent end views thereof, Fig. 3 being partially sectional 011 line so as, Fig. 1. Fig. 45 represents a section of a portion on line '1 y, Fig. 1.

Similar letters of reference indicate corresponding parts in the several figures.

Referring to the drawings, A designates the table of a sewing-machine, and B the drivingshaft thereof. On said shaft B, at the end opposite to the looper O,is an eccentric D,which is encircled bya yoke E of an oscillating arm F, which occupies a vertical position, and has its upper end pivoted to the rising and fallin g frame or needle-arm G, towhich latter the needle-bar H is secured, said bar and the upright limb J of the frame G being guided on the goose-neck or equivalent part K of the machine. The arm F is provided with a se mental slot L, the same being located above the yoke E and receiving a rocking block M, the latter being connected by a pivotal pin or screw N with the limb J of the frame G. The connection of the arm F with the frame G is by means of a screw P, which is connected with said frame, and has a conical head 0, on which is fitted a conical bushing R, the conical shape of the exterior of the latter being the reverse of that of the head Q, said bushing being located in a conical opening at the upper end of the arm F.

S designates a screw, which is fitted into the head Q of the screw P at the outer end thereof, and having a head which overlaps the thus raising and lowering the same. Motion is thus imparted to the frame G, and consequently to the needle-bar, it being seen that said frame which carries the needle-bar receives motions in right-lined directions,which cause the operation of the needle-bar in an easy and rapid manner, avoiding the great friction due to a swinging or vibrating arm, heretofore employed. The arm F oscillates on the head Q of the screw P with but little friction, owing to the conical shape of said head and the bushing R. The head of the screw S retains the bushing, and consequently the upper end of the arm F, in position. When said bushing, the head, and the opening in said upper end of the arm wear away in use, the screw S is tightened, thus moving in the bushing and taking up the wear of the parts, whereby the regularity of motion of the upper end of the arm is preserved and looseness and rattling of the parts of the joint of the arm F and the frame G are prevented. The block M rises with the limb J and oscillates thereon, conforming to the motions of the arm F, due to the slot L,whereby said arm is guided and caused to run true in its oscillations.

The eccentric T on the shaft B, which imparts motion to the feed-bar U, is connected with said shaft by means of a screw V, whereby said eccentric may be set in different positions, and therebycorrectly adjusted in order to impart proper motions to the feed-bar.

Referring to Fig. 4,W' designates a springplate, which is secured at one end to the presser-foot arm and is adapted to be engaged at the other end by a cam-plate X, which is attached to the needle-arm, it being seen that the thread passes between the plate V and bed or contiguous portion Y of the needle-arm, so that as the needle-arm rises and falls the plate X comes in contact with and forces out the end of the plate XV, thus separating said plate X from the bed Y and accordingly releasing the thread. WVhen the plate X clears the plate V, the latter closes against the bed Y and holds the thread. By these means the tension of the thread may be nicely adjusted.

I do not limit myself to a chain-stitch machine, as the improvements are equally adapted to a lock-stitch machine.

Having thus described my invention, what I claim as new, and desire to secureby Letters Patent, is

1. A sewing-machine having a rising and falling frame with needle-bar guided in the goose-neck or frame of the machine, a drivin g-shaft, an arm having an eccentric connection with said shaft and provided with a segmental slot, a rocking block pivoted to a limb of the rising-and-falling frame and Working in the said segmental slot, the said arm having a pivotal connection at its upper end with the rising and falling frame, said parts being combined substantially as described.

2. A sewing-machine having the frame G with needle-bar and limb J, guided in the goose-neck K, the driving-shaft B, the arm F, eccentrically connected to the driving-shaft B and pivotally connected with the frame G, and the rocking block M, pivotally secured to the limb J and guided in the segmental slot, said parts being combined substantially as described.

3. In a sewing-machine, a rising and falling frame carrying the needle-bar, an operatingarm connected with the driving-shaft having a conical opening in its upper end, a screw secured to said frame and having a conical head in said opening of the arm,a conical bushing in said opening bearing on said screw-head, and a screw in said screw-head bearing against the bushing, said parts being combined sub stantially as described.

GEORGE FRIEDRICH WAOIITERSHAUSER.

Witnesses:

EDWARD A. NIVEN, LAWRENCE W. LINE. 

